TECHNICAL SPECIFICATIONS
 
Circuit Design: Based on the classic 4000 E132 "Orange Knob" Console EQ (Inductor-emulation active circuit topology)
Format: 500 Series (VPR Alliance & GDIY 51X compatible)
EQ Type: 4-Band Semi-Parametric with switchable Bell/Shelf
Gain Range: +/- 18 dB per band (with Center Detent for easy recall)
Input/Output: Balanced THAT 1246 Input & THAT 1646 Output Stages
Power Requirements: Standard +/- 16V DC (500 Series Rack)
 
DETAILED FEATURES
 
Four-Band Precision Control:
Low Band: 45Hz – 450Hz (Switchable Shelf/Bell)
Low-Mid Band: 0.2kHz – 2kHz (Fully Parametric with full Q Adjust & Max Gain Changes with Q Settings)
High-Mid Band: 0.6kHz – 6kHz (Fully Parametric with full Q Adjust & Max Gain Changes with Q Settings)
High Band: 1.4kHz – 16kHz (Switchable Shelf/Bell)
Integrated Filters: Dedicated 80Hz Low-Cut (24dB/oct, modifiable) and 8kHz High-Cut (24dB/oct, modifiable) for instant signal cleanup.
Premium Audio Path: High-headroom design featuring original WIMA capacitors and low-noise operational amplifiers.
Professional Build Quality: Dual-layer PCB with immersion gold finish for maximum durability and easy soldering.
 
WHAT'S INCLUDED IN THE KIT?
 
This is a Full DIY Kit including all parts for a successful build:
Powder-coated front panel with high-quality printing
All electronic components (resistors, capacitors, ICs, THAT-chips)
Full set of high-quality Sifam knobs
 
(Note: This product requires assembly and soldering skills. Interactive assembly guides are available in our Build Manuals section.)
 
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